3 files changed, 86 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/sound/renesas,rsnd.txt b/Documentation/devicetree/bindings/sound/renesas,rsnd.txt
index a44e9179faf5..8346cab046cd 100644
--- a/Documentation/devicetree/bindings/sound/renesas,rsnd.txt
+++ b/Documentation/devicetree/bindings/sound/renesas,rsnd.txt
@@ -20,6 +20,7 @@ Required properties:
 SSI subnode properties:
 - interrupts                    : Should contain SSI interrupt for PIO transfer
 - shared-pin                    : if shared clock pin
+- pio-transfer                  : use PIO transfer mode
 
 SRC subnode properties:
 no properties at this point
diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index 073a29354c85..cddb76d7d965 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -256,11 +256,81 @@ int rsnd_dma_available(struct rsnd_dma *dma)
         return !!dma->chan;
 }
 
+#define DMA_NAME_SIZE 16
+#define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
+static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
+{
+        if (mod)
+                return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
+                         rsnd_mod_name(mod), rsnd_mod_id(mod));
+        else
+                return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
+
+}
+
+static void rsnd_dma_of_name(struct rsnd_dma *dma,
+                             int is_play, char *dma_name)
+{
+        struct rsnd_mod *this = rsnd_dma_to_mod(dma);
+        struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
+        struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
+        struct rsnd_mod *src = rsnd_io_to_mod_src(io);
+        struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
+        struct rsnd_mod *mod[MOD_MAX];
+        struct rsnd_mod *src_mod, *dst_mod;
+        int i, index;
+
+
+        for (i = 0; i < MOD_MAX; i++)
+                mod[i] = NULL;
+
+        /*
+         * in play case...
+         *
+         * src -> dst
+         *
+         * mem -> SSI
+         * mem -> SRC -> SSI
+         * mem -> SRC -> DVC -> SSI
+         */
+        mod[0] = NULL; /* for "mem" */
+        index = 1;
+        for (i = 1; i < MOD_MAX; i++) {
+                if (!src) {
+                        mod[i] = ssi;
+                        break;
+                } else if (!dvc) {
+                        mod[i] = src;
+                        src = NULL;
+                } else {
+                        mod[i] = dvc;
+                        dvc = NULL;
+                }
+
+                if (mod[i] == this)
+                        index = i;
+        }
+
+        if (is_play) {
+                src_mod = mod[index - 1];
+                dst_mod = mod[index];
+        } else {
+                src_mod = mod[index];
+                dst_mod = mod[index + 1];
+        }
+
+        index = 0;
+        index = _rsnd_dma_of_name(dma_name + index, src_mod);
+        *(dma_name + index++) = '_';
+        index = _rsnd_dma_of_name(dma_name + index, dst_mod);
+}
+
 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
                   int is_play, int id)
 {
         struct device *dev = rsnd_priv_to_dev(priv);
         struct dma_slave_config cfg;
+        char dma_name[DMA_NAME_SIZE];
         dma_cap_mask_t mask;
         int ret;
 
@@ -272,9 +342,17 @@ int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
         dma_cap_zero(mask);
         dma_cap_set(DMA_SLAVE, mask);
 
+        if (dev->of_node)
+                rsnd_dma_of_name(dma, is_play, dma_name);
+        else
+                snprintf(dma_name, DMA_NAME_SIZE,
+                         is_play ? "tx" : "rx");
+
+        dev_dbg(dev, "dma name : %s\n", dma_name);
+
         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
                                                      (void *)id, dev,
-                                                     is_play ? "tx" : "rx");
+                                                     dma_name);
         if (!dma->chan) {
                 dev_err(dev, "can't get dma channel\n");
                 return -EIO;
diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index 2d94a62a6577..e0a4ba7271e7 100644
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -589,6 +589,12 @@ static void rsnd_of_parse_ssi(struct platform_device *pdev,
                  * irq
                  */
                 ssi_info->pio_irq = irq_of_parse_and_map(np, 0);
+
+                /*
+                 * DMA
+                 */
+                ssi_info->dma_id = of_get_property(np, "pio-transfer", NULL) ?
+                        0 : 1;
         }
 
 rsnd_of_parse_ssi_end: